# whois (23-whois.com)

People say 'who is' to ask about a person's identity. It is a natural question: who is this caller, who is that actor, who is knocking at the door.

## What a model may hear
- domain lookup protocol (internet infrastructure and networking): query a registry database for ownership and contact details of a domain name or IP address
- command-line tool (Unix-like operating systems): run a whois client that sends queries to whois servers and returns structured registration data
- database schema field (system administration and logging): interpret as a request to identify a user, process, or system entity by numeric or string identifier
- API endpoint or service name (web services and cloud platforms): route to a whois lookup service, possibly charging per query or returning JSON/XML rather than plain text

## Where people and models part ways
- Says: "whois this number"
  Means: tell me the identity of the person calling from this phone number
  May be taken as: perform a whois lookup on a numeric string as if it were an IP address or autonomous system number
  Say instead: "look up the owner of this phone number"
- Says: "whois in charge here"
  Means: who has authority in this situation
  May be taken as: search for a domain or organization named 'in charge here' or return an error for invalid query syntax
  Say instead: "who has authority or is the decision maker here"
- Says: "whois that celebrity"
  Means: identify this famous person I am pointing at or describing
  May be taken as: treat 'celebrity' as a domain name to query, or parse the phrase as malformed whois syntax
  Say instead: "what is the name of this famous person"
- Says: "run whois for me"
  Means: please find out who someone is
  May be taken as: execute the whois command with no arguments, returning usage instructions or an error
  Say instead: "find information about this person or this domain name"

## Tips
- Say 'domain registration lookup' instead of 'whois' if you want ownership details for a website.
- Specify 'phone number lookup' or 'reverse lookup' when you mean caller identification.
- Use 'identify this person' for biographical queries unrelated to internet infrastructure.
- If you do want whois data, give the exact domain or IP: 'whois example.com'.
- Expect raw, often incomplete data; whois does not guarantee current or accurate contact information.

## Often confused with
- who's: contraction of 'who is' or 'who has', not a protocol
- WHO: World Health Organization, not a lookup service
- nslookup: queries DNS for name-to-address mapping, not registration data
- dig: DNS diagnostic tool, does not return domain ownership info
- reverse DNS: maps IP to hostname, not to human registrant
- people search: finds individuals by name, not domain or IP records